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3 years ago

A $79 television is on sale for $65. What percent discount was given?

Mathematics

2 answers:

pickupchik [31]3 years ago

6 0

Answer:

The discount percentage has been given: ($ 65 / $ 79) x 100 = 82.27%

So the discount percentage is: 100% -82.27% = 17.72%

Step-by-step explanation:

arlik [135]3 years ago

5 0

Answer:

Step-by-step explanation:

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Find a value of x that is a solution to 5(x – 3) = x + 13.

bezimeni [28]

Answer:

x = 7

Step-by-step explanation:

$5(x-3)=x+13$

distribute

$5x-15= x+13$

combine like terms

$5x-x = 13 + 15$

$4x=28$

x = 7

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3 years ago

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2.25x + 15 = 9.5x + 0.5

natulia [17]

Answer:

x=2

Step-by-step explanation:

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3 years ago

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The table shows the number of books donated to a library each month. Suppose the growth continues exponentially.

telo118 [61]

$\bf \begin{array}{ccll}
\stackrel{t}{months}&\stackrel{A}{books}\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
0&80\\
1&100\\
2&125
\end{array}$ , we know that on Month 0, the Books were 80

$\bf \qquad \textit{Amount for Exponential Growth}\\\\
A=I(1 + r)^t\qquad 
\begin{cases}
A=\textit{accumulated amount}\to &80\\
I=\textit{initial amount}\\
r=rate\to r\%\to \frac{r}{100}\\
t=\textit{elapsed time}\to &0\\
\end{cases}
\\\\\\
80=I(1+r)^0\implies 80=I\qquad therefore\qquad \boxed{A=80(1+r)^t}$

we also know that on the first month there were 100 books,

$\bf \qquad \textit{Amount for Exponential Growth}\\\\
A=I(1 + r)^t\qquad 
\begin{cases}
A=\textit{accumulated amount}\to &100\\
I=\textit{initial amount}\\
r=rate\to r\%\to \frac{r}{100}\\
t=\textit{elapsed time}\to &1\\
\end{cases}
\\\\\\
100=80(1+r)^1\implies \cfrac{100}{80}=1+r\implies \cfrac{5}{4}=1+r
\implies 
\cfrac{5}{4}-1=r
\\\\\\
 \cfrac{1}{4}=r\implies 0.25=r\qquad therefore\qquad \boxed{A=80(1+0.25)^t}$

now, how many books when t = 8? A=80(1+0.25)⁸, or A=80(1.25)⁸.

7 0

3 years ago

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A window shaped like a paralleogram has an area of 18 1/3 square feet. The height of the window is 3 1/3 feet. How long is the b

lilavasa [31]

Answer:

5.5 feet

Step-by-step explanation:

Divide 18 1/3 by 3 1/3 to get 11/2. Simplify that to 5.5 feet.

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4 years ago

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